 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.actions;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.wizard.WizardDialog;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.IEditorInput;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.INewWizard;
 import org.eclipse.ui.IPluginContribution;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.actions.ActionFactory;
 import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
 import org.eclipse.ui.internal.LegacyResourceSupport;
 import org.eclipse.ui.internal.WorkbenchMessages;
 import org.eclipse.ui.internal.util.Util;
 import org.eclipse.ui.wizards.IWizardDescriptor;

 /**
  * Opens a specific new wizard.
  */
 public class NewWizardShortcutAction extends Action implements
         IPluginContribution {
     private IWizardDescriptor wizardElement;

     /**
      * The wizard dialog width
      */
     private static final int SIZING_WIZARD_WIDTH = 500;

     /**
      * The wizard dialog height
      */
     private static final int SIZING_WIZARD_HEIGHT = 500;
     
     private IWorkbenchWindow window;

     /**
      * Create an instance of this class.
      *
      * @param window the workbench window in which this action will appear
      * @param wizardDesc a wizard element
      */
     public NewWizardShortcutAction(IWorkbenchWindow window,
             IWizardDescriptor wizardDesc) {
         super(wizardDesc.getLabel());
         setToolTipText(wizardDesc.getDescription());
         setImageDescriptor(wizardDesc.getImageDescriptor());
         setId(ActionFactory.NEW.getId());
         wizardElement = wizardDesc;
         this.window = window;
     }

     /**
      * Get the wizard descriptor for this action.
      *
      * @return the wizard descriptor
      */
     public IWizardDescriptor getWizardDescriptor() {
         return wizardElement;
     }
    
     /* (non-Javadoc)
      * @see org.eclipse.jface.action.IAction#run()
      */
     public void run() {
         // create instance of target wizard

         INewWizard wizard;
         try {
             wizard = (INewWizard) wizardElement.createWizard();
         } catch (CoreException e) {
             ErrorDialog.openError(window.getShell(), WorkbenchMessages.NewWizardShortcutAction_errorTitle,
                     WorkbenchMessages.NewWizardShortcutAction_errorMessage,
                     e.getStatus());
             return;
         }

         ISelection selection = window.getSelectionService().getSelection();
         IStructuredSelection selectionToPass = StructuredSelection.EMPTY;
         if (selection instanceof IStructuredSelection) {
             selectionToPass = wizardElement
                     .adaptedSelection((IStructuredSelection) selection);
         } else {
             // Build the selection from the IFile of the editor
 IWorkbenchPart part = window.getPartService().getActivePart();
             if (part instanceof IEditorPart) {
                 IEditorInput input = ((IEditorPart) part).getEditorInput();
                 Class fileClass = LegacyResourceSupport.getFileClass();
                 if (input != null && fileClass != null) {
                     Object file = Util.getAdapter(input, fileClass);
                     if (file != null) {
                         selectionToPass = new StructuredSelection(file);
                     }
                 }
             }
         }

         // even tho we MAY finish early without showing a dialog, prep the
 // wizard with a dialog and such in case it's logic requires it
 // - yes, it wastes a dialog but they are plentiful...
 wizard.init(window.getWorkbench(), selectionToPass);

         Shell parent = window.getShell();
         WizardDialog dialog = new WizardDialog(parent, wizard);
         dialog.create();
         Point defaultSize = dialog.getShell().getSize();
         dialog.getShell().setSize(
                 Math.max(SIZING_WIZARD_WIDTH, defaultSize.x),
                 Math.max(SIZING_WIZARD_HEIGHT, defaultSize.y));
         window.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
                 IWorkbenchHelpContextIds.NEW_WIZARD_SHORTCUT);
         
         // if the wizard can finish early and doesn't have any pages, just finish it.
 if (wizardElement.canFinishEarly() && !wizardElement.hasPages()) {
             wizard.performFinish();
             dialog.close();
         } else {
             dialog.open();
         }
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.IPluginContribution#getLocalId()
      */
     public String getLocalId() {
         IPluginContribution contribution = getPluginContribution();
         if (contribution != null) {
             return contribution.getLocalId();
         }
         return wizardElement.getId();
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.IPluginContribution#getPluginId()
      */
     public String getPluginId() {
         IPluginContribution contribution = getPluginContribution();
         if (contribution != null) {
             return contribution.getPluginId();
         }
         return null;
     }
     
     /**
      * Return the plugin contribution associated with the wizard.
      *
      * @return the contribution or <code>null</code>
      * @since 3.1
      */
     private IPluginContribution getPluginContribution() {
         return (IPluginContribution) Util.getAdapter(wizardElement,
                 IPluginContribution.class);
     }
 }

